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Liquid crystal orientation agent, liquid crystal display element, poly-amic acid, polyimide and compound

A technology of liquid crystal alignment agent and polyamic acid, which is applied in the direction of liquid crystal materials, chemical instruments and methods, instruments, etc., and can solve problems such as damage to liquid crystal alignment

Inactive Publication Date: 2009-11-04
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, added the liquid crystal alignment agent of silane coupling agent, although the film thickness uniformity of the coating film that has been improved has been formed, bubble is easily produced when coating of liquid crystal alignment agent, and this bubble becomes the air hole of liquid crystal alignment film, As a result, there is a problem that liquid crystal orientation is impaired

Method used

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  • Liquid crystal orientation agent, liquid crystal display element, poly-amic acid, polyimide and compound
  • Liquid crystal orientation agent, liquid crystal display element, poly-amic acid, polyimide and compound
  • Liquid crystal orientation agent, liquid crystal display element, poly-amic acid, polyimide and compound

Examples

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Effect test

Synthetic example 1

[0130] According to the following synthetic scheme 1, N,N-dioctyl-1,2,4-benzenetriamine was synthesized.

[0131]

[0132] Synthetic route 1

[0133] Under a nitrogen atmosphere, in a 300ml three-necked flask, 11.2g (0.06mol) of 2,4-dinitrofluorobenzene, 10.0g (0.066mol) of cesium fluoride, 14.5g (0.6mol) of di-n-octyl The amines were mixed, 60 ml of dimethyl sulfoxide was added thereto, and stirred to obtain a solution. This solution was heated and stirred at 110° C. under nitrogen for 6 hours to perform a reaction. After the reaction, 200 ml of chloroform was added to the reaction mixture, extracted and washed with 100 ml of ion-exchanged water for 4 times. After the organic layer was dehydrated with magnesium sulfate, it was removed by filtration. The filtrate was concentrated and the solvent was further removed to yield 23.7 g of the dinitro intermediate.

[0134] Then, under a nitrogen atmosphere, add 12.2g (0.03 moles) of the dinitro intermediate synthesized abo...

Synthetic example 2

[0138] 98 g (0.50 mol) of 1,2,3,4-cyclobutanetetracarboxylic dianhydride as tetracarboxylic dianhydride and 109 g (0.50 mol) of pyromellitic dianhydride, 4,4' as diamine - 198g (1.0 mole) of diaminodiphenylmethane was dissolved in a mixed solvent of 230g N-methyl-2-pyrrolidone and 2060g γ-butyrolactone, and after reacting for 3 hours at 40°C, 1350g γ-butyrolactone was added lactone to obtain about 4000 g of a solution containing 10% by weight of polyamic acid (A-1). The solution viscosity of this solution was 125 mPa·s.

Synthetic example 3

[0140] 196 g (1.0 mol) of 1,2,3,4-cyclobutanetetracarboxylic dianhydride as tetracarboxylic dianhydride, 2,2'-dimethyl-4,4'-diamino as diamine Biphenyl 212g (1.0 mole) is dissolved in the mixed solvent that 370g N-methyl-2-pyrrolidone and 3300g gamma-butyrolactone form, after carrying out 3 hours reaction at 40 ℃, obtain containing polyamic acid (A-2 ) solution about 4000g. The solution viscosity of this solution was 160 mPa·s.

[0141]

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Abstract

The invention relates to a liquid crystal orientation agent, a liquid crystal display element, a poly-amic acid, a polyimide and compound. A liquid crystal orientation agent capable of forming liquid crystal orientation film with excellent heat resistance, great in printability and coated film thickness uniformity without generating any air bubbles is provided. The polyamic acid includes at least one polymer selected from poly-amic acid and a group including polyimides prepared from dehydrating and closing loop of the poly-amic acid. The poly-amic acid is prepared from reaction between tetracarboxylic dianhydride and diamine of the compound represented by formula (A), wherein R and R represents alkyl groups with carbon number from 1 to 30 respectively.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent, a liquid crystal display element, a polyamic acid, a polyimide, and a compound. More specifically, it relates to a liquid crystal aligning agent that is excellent in printability and capable of forming a liquid crystal aligning film excellent in heat resistance, and a liquid crystal display capable of high-quality display, capable of suppressing display deterioration due to thermal stress, and capable of being driven for a long time element. Background technique [0002] At present, as a liquid crystal display element, a TN type liquid crystal display element having a so-called TN type (twisted nematic) liquid crystal cell is widely known, and a liquid crystal alignment film is formed on the surface of a substrate on which a transparent conductive film is provided as a substrate for a liquid crystal display element. , the two substrates are placed opposite each other, and a nematic liqu...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08G73/10G02F1/1337
CPCC09K19/56G02F1/133703
Inventor 阿部翼植阪裕介
Owner JSR CORPORATIOON
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